libavcodec/qcelpdata.h

   1 /*
   2  * QCELP decoder
   3  * Copyright (c) 2007 Reynaldo H. Verdejo Pinochet
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef AVCODEC_QCELPDATA_H
  23 #define AVCODEC_QCELPDATA_H
  24
  25 /**
  26  * @file libavcodec/qcelpdata.h
  27  * Data tables for the QCELP decoder
  28  * @author Reynaldo H. Verdejo Pinochet
  29  * @remark FFmpeg merging spearheaded by Kenan Gillet
  30  * @remark Development mentored by Benjamin Larson
  31  */
  32
  33 #include <stddef.h>
  34 #include <stdint.h>
  35 #include "libavutil/common.h"
  36
  37 /**
  38  * QCELP unpacked data frame
  39  */
  40 typedef struct {
  41 /// @defgroup qcelp_codebook_parameters QCELP excitation codebook parameters
  42 /// @{
  43     uint8_t cbsign[16]; ///!< sign of the codebook gain for each codebook subframe
  44     uint8_t cbgain[16]; ///!< unsigned codebook gain for each codebook subframe
  45     uint8_t cindex[16]; ///!< codebook index for each codebook subframe
  46 /// @}
  47
  48 /// @defgroup qcelp_pitch_parameters QCELP pitch prediction parameters
  49 /// @{
  50     uint8_t plag[4];    ///!< pitch lag for each pitch subframe
  51     uint8_t pfrac[4];   ///!< fractional pitch lag for each pitch subframe
  52     uint8_t pgain[4];   ///!< pitch gain for each pitch subframe
  53 /// @}
  54
  55     /**
  56      * line spectral pair frequencies (LSP) for RATE_OCTAVE,
  57      * line spectral pair frequencies grouped into five vectors
  58      * of dimension two (LSPV) for other rates
  59      */
  60     uint8_t lspv[10];
  61
  62     /**
  63      * reserved bits only present in bitrate 1, 1/4 and 1/8 packets
  64      */
  65     uint8_t reserved;
  66 } QCELPFrame;
  67
  68 /**
  69  * pre-calculated table for hammsinc function
  70  * Only half of the table is needed because of symmetry.
  71  *
  72  * TIA/EIA/IS-733 2.4.5.2-2/3
  73  */
  74 static const float qcelp_hammsinc_table[4] = { -0.006822,  0.041249, -0.143459,  0.588863};
  75
  76 typedef struct {
  77     uint8_t index;  /*!< index into the QCELPContext structure */
  78     uint8_t bitpos; /*!< position of the lowest bit in the value's byte */
  79     uint8_t bitlen; /*!< number of bits to read */
  80 } QCELPBitmap;
  81
  82 #define QCELP_OF(variable, bit, len) {offsetof(QCELPFrame, variable), bit, len}
  83
  84 /**
  85  * bitmap unpacking tables for RATE_FULL
  86  *
  87  * TIA/EIA/IS-733 Table 2.4.7.1-1
  88  */
  89 static const QCELPBitmap qcelp_rate_full_bitmap[] = {
  90                                 // start on bit
  91     QCELP_OF(lspv  [ 2], 0, 3), // 265
  92     QCELP_OF(lspv  [ 1], 0, 7), // 262
  93     QCELP_OF(lspv  [ 0], 0, 6), // 255
  94     QCELP_OF(lspv  [ 4], 0, 6), // 249
  95     QCELP_OF(lspv  [ 3], 0, 6), // 243
  96     QCELP_OF(lspv  [ 2], 3, 4), // 237
  97     QCELP_OF(cbsign[ 0], 0, 1), // 233
  98     QCELP_OF(cbgain[ 0], 0, 4), // 232
  99     QCELP_OF(pfrac [ 0], 0, 1), // 228
 100     QCELP_OF(plag  [ 0], 0, 7), // 227
 101     QCELP_OF(pgain [ 0], 0, 3), // 220
 102     QCELP_OF(cindex[ 1], 0, 4), // 217
 103     QCELP_OF(cbsign[ 1], 0, 1), // 213
 104     QCELP_OF(cbgain[ 1], 0, 4), // 212
 105     QCELP_OF(cindex[ 0], 0, 7), // 208
 106     QCELP_OF(cbgain[ 3], 0, 1), // 201
 107     QCELP_OF(cindex[ 2], 0, 7), // 200
 108     QCELP_OF(cbsign[ 2], 0, 1), // 193
 109     QCELP_OF(cbgain[ 2], 0, 4), // 192
 110     QCELP_OF(cindex[ 1], 4, 3), // 188
 111     QCELP_OF(plag  [ 1], 0, 3), // 185
 112     QCELP_OF(pgain [ 1], 0, 3), // 182
 113     QCELP_OF(cindex[ 3], 0, 7), // 179
 114     QCELP_OF(cbsign[ 3], 0, 1), // 172
 115     QCELP_OF(cbgain[ 3], 1, 2), // 171
 116     QCELP_OF(cindex[ 4], 0, 6), // 169
 117     QCELP_OF(cbsign[ 4], 0, 1), // 163
 118     QCELP_OF(cbgain[ 4], 0, 4), // 162
 119     QCELP_OF(pfrac [ 1], 0, 1), // 158
 120     QCELP_OF(plag  [ 1], 3, 4), // 157
 121     QCELP_OF(cbgain[ 6], 0, 3), // 153
 122     QCELP_OF(cindex[ 5], 0, 7), // 150
 123     QCELP_OF(cbsign[ 5], 0, 1), // 143
 124     QCELP_OF(cbgain[ 5], 0, 4), // 142
 125     QCELP_OF(cindex[ 4], 6, 1), // 138
 126     QCELP_OF(cindex[ 7], 0, 3), // 137
 127     QCELP_OF(cbsign[ 7], 0, 1), // 134
 128     QCELP_OF(cbgain[ 7], 0, 3), // 133
 129     QCELP_OF(cindex[ 6], 0, 7), // 130
 130     QCELP_OF(cbsign[ 6], 0, 1), // 123
 131     QCELP_OF(cbgain[ 6], 3, 1), // 122
 132     QCELP_OF(cbgain[ 8], 0, 1), // 121
 133     QCELP_OF(pfrac [ 2], 0, 1), // 120
 134     QCELP_OF(plag  [ 2], 0, 7), // 119
 135     QCELP_OF(pgain [ 2], 0, 3), // 112
 136     QCELP_OF(cindex[ 7], 3, 4), // 109
 137     QCELP_OF(cbsign[ 9], 0, 1), // 105
 138     QCELP_OF(cbgain[ 9], 0, 4), // 104
 139     QCELP_OF(cindex[ 8], 0, 7), // 100
 140     QCELP_OF(cbsign[ 8], 0, 1), //  93
 141     QCELP_OF(cbgain[ 8], 1, 3), //  92
 142     QCELP_OF(cindex[10], 0, 4), //  89
 143     QCELP_OF(cbsign[10], 0, 1), //  85
 144     QCELP_OF(cbgain[10], 0, 4), //  84
 145     QCELP_OF(cindex[ 9], 0, 7), //  80
 146     QCELP_OF(pgain [ 3], 0, 2), //  73
 147     QCELP_OF(cindex[11], 0, 7), //  71
 148     QCELP_OF(cbsign[11], 0, 1), //  64
 149     QCELP_OF(cbgain[11], 0, 3), //  63
 150     QCELP_OF(cindex[10], 4, 3), //  60
 151     QCELP_OF(cindex[12], 0, 2), //  57
 152     QCELP_OF(cbsign[12], 0, 1), //  55
 153     QCELP_OF(cbgain[12], 0, 4), //  54
 154     QCELP_OF(pfrac [ 3], 0, 1), //  50
 155     QCELP_OF(plag  [ 3], 0, 7), //  49
 156     QCELP_OF(pgain [ 3], 2, 1), //  42
 157     QCELP_OF(cindex[13], 0, 6), //  41
 158     QCELP_OF(cbsign[13], 0, 1), //  35
 159     QCELP_OF(cbgain[13], 0, 4), //  34
 160     QCELP_OF(cindex[12], 2, 5), //  30
 161     QCELP_OF(cbgain[15], 0, 3), //  25
 162     QCELP_OF(cindex[14], 0, 7), //  22
 163     QCELP_OF(cbsign[14], 0, 1), //  15
 164     QCELP_OF(cbgain[14], 0, 4), //  14
 165     QCELP_OF(cindex[13], 6, 1), //  10
 166     QCELP_OF(reserved,   0, 2), //   9
 167     QCELP_OF(cindex[15], 0, 7), //   7
 168     QCELP_OF(cbsign[15], 0, 1)  //   0
 169 };
 170
 171 /**
 172  * bitmap unpacking tables for RATE_HALF
 173  *
 174  * TIA/EIA/IS-733 Table 2.4.7.2-1
 175  */
 176 static const QCELPBitmap qcelp_rate_half_bitmap[] = {
 177                                // start on bit
 178     QCELP_OF(lspv  [2], 0, 3), // 123
 179     QCELP_OF(lspv  [1], 0, 7), // 120
 180     QCELP_OF(lspv  [0], 0, 6), // 113
 181     QCELP_OF(lspv  [4], 0, 6), // 107
 182     QCELP_OF(lspv  [3], 0, 6), // 101
 183     QCELP_OF(lspv  [2], 3, 4), //  95
 184     QCELP_OF(cbsign[0], 0, 1), //  91
 185     QCELP_OF(cbgain[0], 0, 4), //  90
 186     QCELP_OF(pfrac [0], 0, 1), //  86
 187     QCELP_OF(plag  [0], 0, 7), //  85
 188     QCELP_OF(pgain [0], 0, 3), //  78
 189     QCELP_OF(plag  [1], 0, 6), //  75
 190     QCELP_OF(pgain [1], 0, 3), //  69
 191     QCELP_OF(cindex[0], 0, 7), //  66
 192     QCELP_OF(pgain [2], 0, 2), //  59
 193     QCELP_OF(cindex[1], 0, 7), //  57
 194     QCELP_OF(cbsign[1], 0, 1), //  50
 195     QCELP_OF(cbgain[1], 0, 4), //  49
 196     QCELP_OF(pfrac [1], 0, 1), //  45
 197     QCELP_OF(plag  [1], 6, 1), //  44
 198     QCELP_OF(cindex[2], 0, 2), //  43
 199     QCELP_OF(cbsign[2], 0, 1), //  41
 200     QCELP_OF(cbgain[2], 0, 4), //  40
 201     QCELP_OF(pfrac [2], 0, 1), //  36
 202     QCELP_OF(plag  [2], 0, 7), //  35
 203     QCELP_OF(pgain [2], 2, 1), //  28
 204     QCELP_OF(pfrac [3], 0, 1), //  27
 205     QCELP_OF(plag  [3], 0, 7), //  26
 206     QCELP_OF(pgain [3], 0, 3), //  19
 207     QCELP_OF(cindex[2], 2, 5), //  16
 208     QCELP_OF(cindex[3], 0, 7), //  11
 209     QCELP_OF(cbsign[3], 0, 1), //   4
 210     QCELP_OF(cbgain[3], 0, 4)  //   3
 211 };
 212
 213 /**
 214  * bitmap unpacking tables for RATE_QUARTER
 215  *
 216  * TIA/EIA/IS-733 Table 2.4.7.3-1
 217  */
 218 static const QCELPBitmap qcelp_rate_quarter_bitmap[] = {
 219                                // start on bit
 220     QCELP_OF(lspv  [2], 0, 3), // 53
 221     QCELP_OF(lspv  [1], 0, 7), // 50
 222     QCELP_OF(lspv  [0], 0, 6), // 43
 223     QCELP_OF(lspv  [4], 0, 6), // 37
 224     QCELP_OF(lspv  [3], 0, 6), // 31
 225     QCELP_OF(lspv  [2], 3, 4), // 25
 226     QCELP_OF(cbgain[3], 0, 4), // 21
 227     QCELP_OF(cbgain[2], 0, 4), // 17
 228     QCELP_OF(cbgain[1], 0, 4), // 13
 229     QCELP_OF(cbgain[0], 0, 4), //  9
 230     QCELP_OF(reserved,  0, 2), //  5
 231     QCELP_OF(cbgain[4], 0, 4)  //  3
 232 };
 233
 234 /**
 235  * bitmap unpacking tables for RATE_OCTAVE
 236  *
 237  * trick: CBSEED is written into QCELPContext.cbsign[15],
 238  * which is not used for RATE_OCTAVE.
 239  * CBSEED is only used to ensure the occurrence of random bit
 240  * patterns in the 16 first bits that are used as the seed.
 241  *
 242  * TIA/EIA/IS-733 Table 2.4.7.4-1
 243  */
 244 static const QCELPBitmap qcelp_rate_octave_bitmap[] = {
 245                                 // start on bit
 246     QCELP_OF(cbsign[15], 3, 1), // 19
 247     QCELP_OF(lspv   [0], 0, 1), // 18
 248     QCELP_OF(lspv   [1], 0, 1), // 17
 249     QCELP_OF(lspv   [2], 0, 1), // 16
 250     QCELP_OF(cbsign[15], 2, 1), // 15
 251     QCELP_OF(lspv   [3], 0, 1), // 14
 252     QCELP_OF(lspv   [4], 0, 1), // 13
 253     QCELP_OF(lspv   [5], 0, 1), // 12
 254     QCELP_OF(cbsign[15], 1, 1), // 11
 255     QCELP_OF(lspv   [6], 0, 1), // 10
 256     QCELP_OF(lspv   [7], 0, 1), //  9
 257     QCELP_OF(lspv   [8], 0, 1), //  8
 258     QCELP_OF(cbsign[15], 0, 1), //  7
 259     QCELP_OF(lspv   [9], 0, 1), //  6
 260     QCELP_OF(cbgain [0], 0, 2), //  7
 261     QCELP_OF(reserved,   0, 4)  //  3
 262 };
 263
 264 /**
 265  * position of the bitmapping data for each packet type in
 266  * the QCELPContext
 267  */
 268 static const QCELPBitmap * const qcelp_unpacking_bitmaps_per_rate[5] = {
 269     NULL,                     ///!< for SILENCE rate
 270     qcelp_rate_octave_bitmap,
 271     qcelp_rate_quarter_bitmap,
 272     qcelp_rate_half_bitmap,
 273     qcelp_rate_full_bitmap,
 274 };
 275
 276 static const uint16_t qcelp_unpacking_bitmaps_lengths[5] = {
 277     0, ///!< for SILENCE rate
 278     FF_ARRAY_ELEMS(qcelp_rate_octave_bitmap),
 279     FF_ARRAY_ELEMS(qcelp_rate_quarter_bitmap),
 280     FF_ARRAY_ELEMS(qcelp_rate_half_bitmap),
 281     FF_ARRAY_ELEMS(qcelp_rate_full_bitmap),
 282 };
 283
 284 typedef uint16_t qcelp_vector[2];
 285
 286 /**
 287  * LSP vector quantization tables in x*10000 form
 288  *
 289  * TIA/EIA/IS-733 tables 2.4.3.2.6.3-1 through 2.4.3.2.6.3-5
 290  */
 291
 292 static const qcelp_vector qcelp_lspvq1[64]= {
 293 { 327, 118},{ 919, 111},{ 427, 440},{1327, 185},
 294 { 469,  50},{1272,  91},{ 892,  59},{1771, 193},
 295 { 222, 158},{1100, 127},{ 827,  55},{ 978, 791},
 296 { 665,  47},{ 700,1401},{ 670, 859},{1913,1048},
 297 { 471, 215},{1046, 125},{ 645, 298},{1599, 160},
 298 { 593,  39},{1187, 462},{ 749, 341},{1520, 511},
 299 { 290, 792},{ 909, 362},{ 753,  81},{1111,1058},
 300 { 519, 253},{ 828, 839},{ 685, 541},{1421,1258},
 301 { 386, 130},{ 962, 119},{ 542, 387},{1431, 185},
 302 { 526,  51},{1175, 260},{ 831, 167},{1728, 510},
 303 { 273, 437},{1172, 113},{ 771, 144},{1122, 751},
 304 { 619, 119},{ 492,1276},{ 658, 695},{1882, 615},
 305 { 415, 200},{1018,  88},{ 681, 339},{1436, 325},
 306 { 555, 122},{1042, 485},{ 826, 345},{1374, 743},
 307 { 383,1018},{1005, 358},{ 704,  86},{1301, 586},
 308 { 597, 241},{ 832, 621},{ 555, 573},{1504, 839}};
 309
 310 static const qcelp_vector qcelp_lspvq2[128]= {
 311 { 255, 293},{ 904, 219},{ 151,1211},{1447, 498},
 312 { 470, 253},{1559, 177},{1547, 994},{2394, 242},
 313 {  91, 813},{ 857, 590},{ 934,1326},{1889, 282},
 314 { 813, 472},{1057,1494},{ 450,3315},{2163,1895},
 315 { 538, 532},{1399, 218},{ 146,1552},{1755, 626},
 316 { 822, 202},{1299, 663},{ 706,1732},{2656, 401},
 317 { 418, 745},{ 762,1038},{ 583,1748},{1746,1285},
 318 { 527,1169},{1314, 830},{ 556,2116},{1073,2321},
 319 { 297, 570},{ 981, 403},{ 468,1103},{1740, 243},
 320 { 725, 179},{1255, 474},{1374,1362},{1922, 912},
 321 { 285, 947},{ 930, 700},{ 593,1372},{1909, 576},
 322 { 588, 916},{1110,1116},{ 224,2719},{1633,2220},
 323 { 402, 520},{1061, 448},{ 402,1352},{1499, 775},
 324 { 664, 589},{1081, 727},{ 801,2206},{2165,1157},
 325 { 566, 802},{ 911,1116},{ 306,1703},{1792, 836},
 326 { 655, 999},{1061,1038},{ 298,2089},{1110,1753},
 327 { 361, 311},{ 970, 239},{ 265,1231},{1495, 573},
 328 { 566, 262},{1569, 293},{1341,1144},{2271, 544},
 329 { 214, 877},{ 847, 719},{ 794,1384},{2067, 274},
 330 { 703, 688},{1099,1306},{ 391,2947},{2024,1670},
 331 { 471, 525},{1245, 290},{ 264,1557},{1568, 807},
 332 { 718, 399},{1193, 685},{ 883,1594},{2729, 764},
 333 { 500, 754},{ 809,1108},{ 541,1648},{1523,1385},
 334 { 614,1196},{1209, 847},{ 345,2242},{1442,1747},
 335 { 199, 560},{1092, 194},{ 349,1253},{1653, 507},
 336 { 625, 354},{1376, 431},{1187,1465},{2164, 872},
 337 { 360, 974},{1008, 698},{ 704,1346},{2114, 452},
 338 { 720, 816},{1240,1089},{ 439,2475},{1498,2040},
 339 { 336, 718},{1213, 187},{ 451,1450},{1368, 885},
 340 { 592, 578},{1131, 531},{ 861,1855},{1764,1500},
 341 { 444, 970},{ 935, 903},{ 424,1687},{1633,1102},
 342 { 793, 897},{1060, 897},{ 185,2011},{1205,1855}};
 343
 344 static const qcelp_vector qcelp_lspvq3[128]= {
 345 { 225, 283},{1296, 355},{ 543, 343},{2073, 274},
 346 { 204,1099},{1562, 523},{1388, 161},{2784, 274},
 347 { 112, 849},{1870, 175},{1189, 160},{1490,1088},
 348 { 969,1115},{ 659,3322},{1158,1073},{3183,1363},
 349 { 517, 223},{1740, 223},{ 704, 387},{2637, 234},
 350 { 692,1005},{1287,1610},{ 952, 532},{2393, 646},
 351 { 490, 552},{1619, 657},{ 845, 670},{1784,2280},
 352 { 191,1775},{ 272,2868},{ 942, 952},{2628,1479},
 353 { 278, 579},{1565, 218},{ 814, 180},{2379, 187},
 354 { 276,1444},{1199,1223},{1200, 349},{3009, 307},
 355 { 312, 844},{1898, 306},{ 863, 470},{1685,1241},
 356 { 513,1727},{ 711,2233},{1085, 864},{3398, 527},
 357 { 414, 440},{1356, 612},{ 964, 147},{2173, 738},
 358 { 465,1292},{ 877,1749},{1104, 689},{2105,1311},
 359 { 580, 864},{1895, 752},{ 652, 609},{1485,1699},
 360 { 514,1400},{ 386,2131},{ 933, 798},{2473, 986},
 361 { 334, 360},{1375, 398},{ 621, 276},{2183, 280},
 362 { 311,1114},{1382, 807},{1284, 175},{2605, 636},
 363 { 230, 816},{1739, 408},{1074, 176},{1619,1120},
 364 { 784,1371},{ 448,3050},{1189, 880},{3039,1165},
 365 { 424, 241},{1672, 186},{ 815, 333},{2432, 324},
 366 { 584,1029},{1137,1546},{1015, 585},{2198, 995},
 367 { 574, 581},{1746, 647},{ 733, 740},{1938,1737},
 368 { 347,1710},{ 373,2429},{ 787,1061},{2439,1438},
 369 { 185, 536},{1489, 178},{ 703, 216},{2178, 487},
 370 { 154,1421},{1414, 994},{1103, 352},{3072, 473},
 371 { 408, 819},{2055, 168},{ 998, 354},{1917,1140},
 372 { 665,1799},{ 993,2213},{1234, 631},{3003, 762},
 373 { 373, 620},{1518, 425},{ 913, 300},{1966, 836},
 374 { 402,1185},{ 948,1385},{1121, 555},{1802,1509},
 375 { 474, 886},{1888, 610},{ 739, 585},{1231,2379},
 376 { 661,1335},{ 205,2211},{ 823, 822},{2480,1179}};
 377
 378 static const qcelp_vector qcelp_lspvq4[64]= {
 379 { 348, 311},{ 812,1145},{ 552, 461},{1826, 263},
 380 { 601, 675},{1730, 172},{1523, 193},{2449, 277},
 381 { 334, 668},{ 805,1441},{1319, 207},{1684, 910},
 382 { 582,1318},{1403,1098},{ 979, 832},{2700,1359},
 383 { 624, 228},{1292, 979},{ 800, 195},{2226, 285},
 384 { 730, 862},{1537, 601},{1115, 509},{2720, 354},
 385 { 218,1167},{1212,1538},{1074, 247},{1674,1710},
 386 { 322,2142},{1263, 777},{ 981, 556},{2119,1710},
 387 { 193, 596},{1035, 957},{ 694, 397},{1997, 253},
 388 { 743, 603},{1584, 321},{1346, 346},{2221, 708},
 389 { 451, 732},{1040,1415},{1184, 230},{1853, 919},
 390 { 310,1661},{1625, 706},{ 856, 843},{2902, 702},
 391 { 467, 348},{1108,1048},{ 859, 306},{1964, 463},
 392 { 560,1013},{1425, 533},{1142, 634},{2391, 879},
 393 { 397,1084},{1345,1700},{ 976, 248},{1887,1189},
 394 { 644,2087},{1262, 603},{ 877, 550},{2203,1307}};
 395
 396 static const qcelp_vector qcelp_lspvq5[64]= {
 397 { 360, 222},{ 820,1097},{ 601, 319},{1656, 198},
 398 { 604, 513},{1552, 141},{1391, 155},{2474, 261},
 399 { 269, 785},{1463, 646},{1123, 191},{2015, 223},
 400 { 785, 844},{1202,1011},{ 980, 807},{3014, 793},
 401 { 570, 180},{1135,1382},{ 778, 256},{1901, 179},
 402 { 807, 622},{1461, 458},{1231, 178},{2028, 821},
 403 { 387, 927},{1496,1004},{ 888, 392},{2246, 341},
 404 { 295,1462},{1156, 694},{1022, 473},{2226,1364},
 405 { 210, 478},{1029,1020},{ 722, 181},{1730, 251},
 406 { 730, 488},{1465, 293},{1303, 326},{2595, 387},
 407 { 458, 584},{1569, 742},{1029, 173},{1910, 495},
 408 { 605,1159},{1268, 719},{ 973, 646},{2872, 428},
 409 { 443, 334},{ 835,1465},{ 912, 138},{1716, 442},
 410 { 620, 778},{1316, 450},{1186, 335},{1446,1665},
 411 { 486,1050},{1675,1019},{ 880, 278},{2214, 202},
 412 { 539,1564},{1142, 533},{ 984, 391},{2130,1089}};
 413
 414 static const qcelp_vector * const qcelp_lspvq[5] = {
 415     qcelp_lspvq1,
 416     qcelp_lspvq2,
 417     qcelp_lspvq3,
 418     qcelp_lspvq4,
 419     qcelp_lspvq5
 420 };
 421
 422 /**
 423  * the final gain scalefactor before clipping into a usable output float
 424  */
 425 #define QCELP_SCALE 8192.
 426
 427 /**
 428  * the upper boundary of the clipping, depends on QCELP_SCALE
 429  */
 430 #define QCELP_CLIP_UPPER_BOUND (8191.75/8192.)
 431
 432 /**
 433  * the lower boundary of the clipping, depends on QCELP_SCALE
 434  */
 435 #define QCELP_CLIP_LOWER_BOUND -1.
 436
 437 /**
 438  * table for computing Ga (decoded linear codebook gain magnitude)
 439  *
 440  * @note The table could fit in int16_t in x*8 form, but it seems
 441  *       to be slower on x86
 442  *
 443  * TIA/EIA/IS-733 2.4.6.2.1-3
 444  */
 445
 446 static const float qcelp_g12ga[61] = {
 447     1.000/QCELP_SCALE,   1.125/QCELP_SCALE,   1.250/QCELP_SCALE,   1.375/QCELP_SCALE,
 448     1.625/QCELP_SCALE,   1.750/QCELP_SCALE,   2.000/QCELP_SCALE,   2.250/QCELP_SCALE,
 449     2.500/QCELP_SCALE,   2.875/QCELP_SCALE,   3.125/QCELP_SCALE,   3.500/QCELP_SCALE,
 450     4.000/QCELP_SCALE,   4.500/QCELP_SCALE,   5.000/QCELP_SCALE,   5.625/QCELP_SCALE,
 451     6.250/QCELP_SCALE,   7.125/QCELP_SCALE,   8.000/QCELP_SCALE,   8.875/QCELP_SCALE,
 452    10.000/QCELP_SCALE,  11.250/QCELP_SCALE,  12.625/QCELP_SCALE,  14.125/QCELP_SCALE,
 453    15.875/QCELP_SCALE,  17.750/QCELP_SCALE,  20.000/QCELP_SCALE,  22.375/QCELP_SCALE,
 454    25.125/QCELP_SCALE,  28.125/QCELP_SCALE,  31.625/QCELP_SCALE,  35.500/QCELP_SCALE,
 455    39.750/QCELP_SCALE,  44.625/QCELP_SCALE,  50.125/QCELP_SCALE,  56.250/QCELP_SCALE,
 456    63.125/QCELP_SCALE,  70.750/QCELP_SCALE,  79.375/QCELP_SCALE,  89.125/QCELP_SCALE,
 457   100.000/QCELP_SCALE, 112.250/QCELP_SCALE, 125.875/QCELP_SCALE, 141.250/QCELP_SCALE,
 458   158.500/QCELP_SCALE, 177.875/QCELP_SCALE, 199.500/QCELP_SCALE, 223.875/QCELP_SCALE,
 459   251.250/QCELP_SCALE, 281.875/QCELP_SCALE, 316.250/QCELP_SCALE, 354.875/QCELP_SCALE,
 460   398.125/QCELP_SCALE, 446.625/QCELP_SCALE, 501.125/QCELP_SCALE, 562.375/QCELP_SCALE,
 461   631.000/QCELP_SCALE, 708.000/QCELP_SCALE, 794.375/QCELP_SCALE, 891.250/QCELP_SCALE,
 462  1000.000/QCELP_SCALE};
 463
 464 /**
 465  * circular codebook for rate 1 frames in x*100 form
 466  *
 467  * TIA/EIA/IS-733 2.4.6.1-2
 468  */
 469 static const int16_t qcelp_rate_full_codebook[128] = {
 470      10,  -65,  -59,   12,  110,   34, -134,  157,
 471     104,  -84,  -34, -115,   23, -101,    3,   45,
 472    -101,  -16,  -59,   28,  -45,  134,  -67,   22,
 473      61,  -29,  226,  -26,  -55, -179,  157,  -51,
 474    -220,  -93,  -37,   60,  118,   74,  -48,  -95,
 475    -181,  111,   36,  -52, -215,   78, -112,   39,
 476     -17,  -47, -223,   19,   12,  -98, -142,  130,
 477      54, -127,   21,  -12,   39,  -48,   12,  128,
 478       6, -167,   82, -102,  -79,   55,  -44,   48,
 479     -20,  -53,    8,  -61,   11,  -70, -157, -168,
 480      20,  -56,  -74,   78,   33,  -63, -173,   -2,
 481     -75,  -53, -146,   77,   66,  -29,    9,  -75,
 482      65,  119,  -43,   76,  233,   98,  125, -156,
 483     -27,   78,   -9,  170,  176,  143, -148,   -7,
 484      27, -136,    5,   27,   18,  139,  204,    7,
 485    -184, -197,   52,   -3,   78, -189,    8,  -65
 486 };
 487 #define QCELP_RATE_FULL_CODEBOOK_RATIO .01
 488
 489 /**
 490  * circular codebook for rate 1/2 frames in x*2 form
 491  *
 492  * TIA/EIA/IS-733 2.4.6.1-1
 493  */
 494 static const int8_t qcelp_rate_half_codebook[128] = {
 495      0, -4,  0, -3,  0,  0,  0,  0,
 496      0,  0,  0,  0,  0,  0,  0,  0,
 497      0, -3, -2,  0,  0,  0,  0,  0,
 498      0,  0,  0,  0,  0,  0,  0,  5,
 499      0,  0,  0,  0,  0,  0,  4,  0,
 500      0,  3,  2,  0,  3,  4,  0,  0,
 501      0,  0,  0,  0,  0,  0,  0,  0,
 502      0,  0,  0,  0,  0,  3,  0,  0,
 503     -3,  3,  0,  0, -2,  0,  3,  0,
 504      0,  0,  0,  0,  0,  0, -5,  0,
 505      0,  0,  0,  3,  0,  0,  0,  3,
 506      0,  0,  0,  0,  0,  0,  0,  4,
 507      0,  0,  0,  0,  0,  0,  0,  0,
 508      0,  3,  6, -3, -4,  0, -3, -3,
 509      3, -3,  0,  0,  0,  0,  0,  0,
 510      0,  0,  0,  0,  0,  0,  0,  0
 511 };
 512 #define QCELP_RATE_HALF_CODEBOOK_RATIO 0.5
 513
 514 /**
 515  * sqrt(1.887) is the maximum of the pseudorandom
 516  * white sequence used to generate the scaled codebook
 517  * vector for bitrate 1/4.
 518  *
 519  * TIA/EIA/IS-733 2.4.8.1.2
 520  */
 521 #define QCELP_SQRT1887 1.373681186
 522
 523 /**
 524  * table for impulse response of BPF used to filter
 525  * the white excitation for bitrate 1/4 synthesis
 526  *
 527  * Only half the tables are needed because of symmetry.
 528  *
 529  * TIA/EIA/IS-733 2.4.8.1.2-1.1
 530  */
 531 static const double qcelp_rnd_fir_coefs[11] = {
 532   -1.344519e-1, 1.735384e-2, -6.905826e-2, 2.434368e-2,
 533   -8.210701e-2, 3.041388e-2, -9.251384e-2, 3.501983e-2,
 534   -9.918777e-2, 3.749518e-2,  8.985137e-1
 535 };
 536
 537 /**
 538  * This spread factor is used, for bitrate 1/8 and I_F_Q,
 539  * to force the LSP frequencies to be at least 80 Hz apart.
 540  *
 541  * TIA/EIA/IS-733 2.4.3.3.2
 542  */
 543 #define QCELP_LSP_SPREAD_FACTOR 0.02
 544
 545 /**
 546  * predictor coefficient for the conversion of LSP codes
 547  * to LSP frequencies for 1/8 and I_F_Q
 548  *
 549  * TIA/EIA/IS-733 2.4.3.2.7-2
 550  */
 551 #define QCELP_LSP_OCTAVE_PREDICTOR 29.0/32
 552
 553 /**
 554  * initial coefficient to perform bandwidth expansion on LPC
 555  *
 556  * @note: 0.9883 looks like an approximation of 253/256.
 557  *
 558  * TIA/EIA/IS-733 2.4.3.3.6 6
 559  */
 560 #define QCELP_BANDWIDTH_EXPANSION_COEFF 0.9883
 561
 562 #endif /* AVCODEC_QCELPDATA_H */